Dramatic video of shooting by Chicago cop last Halloween released by authorities

The Civilian Office of Police Accountability released a video showing a police officer shooting and wounding, Derrell Johnson, 23, a reputed gang member on parole who fled from the officer through a stairwell inside a South Side apartment building. (COPA)

The Civilian Office of Police Accountability released a video showing a police officer shooting and wounding, Derrell Johnson, 23, a reputed gang member on parole who fled from the officer through a stairwell inside a South Side apartment building. (COPA)

The Civilian Office of Police Accountability released the footage shortly before a 60-day deadline imposed by the city in the wake of the Laquan McDonald shooting scandal.

Police reports made public by COPA along with the video indicate the man pointed a gun at the officer shortly after 7 p.m. last Halloween.

Police said a handgun with an extended magazine was recovered inside the apartment building in the 7900 block of South Ingleside Avenue in the city’s East Chatham neighborhood.

Derrell Johnson, 23, was taken to an area hospital for treatment and charged with multiple felonies, including being an armed habitual criminal, aggravated assault to a police officer and a misdemeanor charge of possessing a high-capacity magazine and metal-piercing bullets.

Johnson, who was on parole for a 2015 felony drug conviction at the time of the shooting, is back in custody in state prison, records show. Police said he has a tattoo on his lower left arm showing a skull with the lettering “Cpdk,” a street term allegedly standing for “Chicago Police Department killer.”

According to the body camera footage released by COPA, an officer entered through the rear of an apartment and spotted Johnson at the front door. The officer, carrying a flashlight and his service weapon, briefly chased Johnson as he fled down a stairwell in the building’s hallway.

Police reports released by COPA identified the officer as Constantino Martinez.

Within seconds, the officer indicated that Johnson was carrying a gun.